Bookmark OS - Bookmark OS is like Mac or Windows optimized for bookmarks.
Short - The reading list for busy people
Raindrop.io - All your articles, photos, video & content from web & apps in one place.
7reads - A minimal mindful reading list for Google Chrome.
Siimpl Bookmarking - Start collecting and organizing what interests you
Votum for Slack - Crowdsourced lists with upvotes, inside Slack